Water (freeze) if the temperature falls below zero. If he’s angry, his face always (go) bright red. If you put your money in a saving account, you (get) ten per cent interest. If the microphone isn’t working, you (can/not) hear what he’s saying. If there (be) only a few students, we usually close one of the classes. If a balloon is filled with hot air, it (rise). If water (boil), it changes into steam. The machine stops automatically if something (go) wrong.
Water freezes...
...always goes bright red...
...you'll get...
...you can't hear...
if there are...
...it rises...
If water boils...
...if something goes wrong.
Объяснение:
conditionals